Electric heater.



1:12 22 Q Alil0 105 1/7 1/7 19 1/ 3 99 23 1/3 I Win/E8858: INVENTOR Patented Feb. 17, 1914.

JOHANN G. WALLMANN, OF OAKLAND, CALIFORNIA.

ELECTRIC HEATER.

Specification of Letters Patent:

Patented Feb. 1'3, 191-1..

Application filed March 18, 191.3. Serial No. 755,222.

To all whom it may concern Be itknown that I, JOHANN G. MANN, a citizen of the United States, residing at the city of Oakland. in the county of Alameda and State of California, have in vented certain new and useful Improvements in Electric Heaters, of which the following is a specification.

My invention relates to improvements in electric heaters. 1

The object of my invention is to-provide a novel electric heater having certain advantages which will hereinafter appear.

My invention consists in the combination and arrangements of parts shown in the accompanying drawing, described in the following specification and claimed in the ap pended claims.

Referring to the drawings, Figure 1 is a longitudinal section of the device, showing one side of the same. Fig. 2 is another longitudinal view of the device, showing a ridges or notches 117 held together with supports are penetrated by and are slidable different side of the same. Fig. 3 is a detail of resistance wire 105, showing the reinforc'ed part 130. Fig. 4 is a side elevation of the porcelain insulator 117 showing In the drawings 18 are the side plates and 102' and 103 are end plates, comprising the casing of the de ice. One ofthe end plates is penetrated by pipe 19 and one of the side plates is penetrated by pipe 98. The device is provided with an asbestos lining 99, lying next to the side and end portions of the casing. A flat boiler preferably of brass, is in connection. with inlet pipe 98 and outlet pipe 19. Resistance wires 105 having reinforced parts 130 run longitudinally in the device being held in place by pins 122 and 123 respectively. Porcelain insulators 117 running transversely are penetrated and held in place by bolts 116, the said insulators being provided with notches 117 equidistantly separating and holding wires 105.

106 shows sheets of mica insulation.

Bolts 121 hold in place fixed end supports 119. Pins 122 are set in said end support-s as shown and hold wires 105. At one end the end supports 112 and 113 are bolts 115 and such end on boiler 104. Bars 109, preferably of cophave end prongs 111 as shown. Said by brackets bars are slidably held in place 108, which 110 and turnable tension screw W'Ame' has a pointed end v screw is turnably supported as shown,

, seated in the counter s end of bar 109. The pins 123 lit firmly supports 112 and 113, as do pins 122 in sup-- port 119. The wires 105 are turned on pins 122 and 123, and are held in place by pores lain bars or insulators 117, the wiresiitting in the notches 117' thereof to space said wires so as to prevent them from con ing. The screws 102 hold the end piece 1= in place, and screws 103 hold the oppos end-piece in place. The insulated te .mi-- nals 97 are for-the purpose of conducting electric current to the device. Supports 112 and 113 constitute a slide. Supports 119 are secured by screws 121. The en largement as shown adds strength. to wire 105.

In the operation, water is admitted into 75 the boiler 104: by inlet pipe 98 and electric current passing over resistancewires 105 of the electric element adjacent to said boiler, the said wires are heated and in turn heat the water in said boiler, steam is formed, which may be permitted to enter a radiator for the purpose of heating the same. The heat created in said resistance Wires also causes bars '109 to'ex'p'and lengthwise, forcing the combined slidable elements 112- and 113 forward, thus taking up any slacl." in the hot resistance wires 105 and-preventing them from short-circuiting. The bar 109 may also be forced forward by the turning of screw 108. The wires 105 lying upon a flat piece of mica as mentioned, the mica is consequently not cracked-as in the old process of winding, thus insuring against grounding.

The expansion of the prongs of bar 109 by heating facilitates the forward. as; movement or the slide composed of elements 112 and 113.v

' I claim 1. In an electric heateig'a casing having an inlet pipe and an outlet pipe extending therethrough, a boiler in said casing having openings containing said pipes, and plu: rality of non-contacting wires adjacent to and running longitudinally with said hoiicr, end supports securing said wires and slidable on said boiler, and means for conduct ing electric current to said wires.

2. In an electric heater, a casing having an inlet pipe and an outlet pipe extending tl-ierethrough, a boiler in said casing has" ing openings containing said pipes, a pinrality of non-contacting wires adjaccntto leiigiiudinally with said do l ar liming prongs at one i (11 each side of said boiler, a (ful UQlTHii to said Wires and movable l uman: for conducting electric to said wil s.

an elwxt'ric heater, a casing having pipe and an outlet 'pipe extending imugh, a boiler in said casing having innit-patina \Vli'CS adjacent to and fltlldlllfllly Wlt-l'l sald boiler, a

" id bait 31' and engageable with said containing said pipes, a plurality 

